This technical-grade calcium chloride can be used to raise the calcium hardness in recirculating systems. Depending upon the water's buffering capacity, it may raise or lower the pH. Normal calcium hardness levels in recirculating aquaculture systems should be maintained between 100–250 mg/L, depending on the species.

Sold in 3.5-lb jar or 35-lb reusable bucket. Fast-dissolving pellets are 1/8" to 1/4" in size. Made in USA.

International customers: Check with your customs agent to determine whether this product can be shipped to your country.

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